1. Get a toilet paper tube and crease two lines to form a flat sided tunnel.2. Put a treat on one end of the tube: A cracker and dab of peanut butter works great.3. Get a tall (at least 20 inches) bucket. A trash can works well.4. Balance the tube precariously on the edge of a table or counter with the treat hanging directly over the tall sided receptacle.5. The mouse will scurry to the treat (they like tunnels) and fall into the trap.